Sash-pulley case



(No Model.)l 8

C. S. WELLS.

SASH PULLBY CASE.

Patented NOV. 20, 1888-.

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UNITED STATES IDATENT rErcE.

CHRISTOPHER S. -VELLS, OF INGRAM STATION, PENNSYLVANIA.

SASH-PULLEY CAS E.

SPECIFICATION forming part of Letters Patent No. 393,281, dated November 2O` 1888,

Application filed December i5. 1886. Renewed October Q3, 1888. Serial No. $8,991. (No model.)

To @ZZ whom, it may concern,.-

Be it known that I, CHRISTOPHER SVELLS, of Ingram Station, iu the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Sash-Gord Pulleys, and I do hereby declare the following to be a full, clear, and exact description thereof.

The faces of sheaves or pulleys heretofore used for the sash-cords of counterbalanccd window-sash have been open,the front edge of the pulley extending beyond the windowframe and the pulley-case sufficiently to hangthe sashcord clear of the side of the frame. The rest of the pulley, with its metal case, is inserted into a suitable mortise or aperture at the upper end of the groove in which the sash-weight moves. rIhe objection to this construction is that the wood-work of the frame is usually more or less open, by reason of shrinkage and imperfectjoints, and an upward draft extends through the groove, especially when the weight rises therein, which causes dust and soot which enter the open face of the pulley-case and deposit on the sides of the weight-groove to be ejected from the open face of the pulley-case and be deposited on the curtains, necessitating their frequent removal and cleansing, which is a source of discomfort and trouble to the housekeeper. Another objection is that the cord in raising the window is liable to become kinked, especially if there is a stoppage orjamming of the weight in the groove, and be caught between the pulley and its case, and theimpatient efforts that are usually made to disentangle or disengage the window-cord often result in breaking it.

My improvement is designed to obviate these difficulties; and it consists in providing the pulley-case with a dust-cap and guide, which closes the open face of the pulley-case and guides the cord in its movement over the pulley.

To enable others skilled in the art to make and use1ny'invention,I will now describe it by reference to the accompanying drawings, in which- Figure 1 is a view of a portion of the window sash and frame partly in section to show the construction of the pulley and its cap.

Fig. 2 is an inside view of the pulley-cap. Fig. 3 isa face view of the pulley and its case.

Like letters of reference indicate like parts in each.

The window-sash a is provided with a sash cord, b, on cach side, by which it is suspended, each cord passing over a pulley, c, journaled in a suitable case,d,inserted in a mortise, e, in thewindow-frainef,and the window is counterbalanced by a weight, g, attached to each cord, which Weight moves in a vertical groove, h, in the window-frame. The foregoing construction is the one commonly in use. The pulley-case d has the open face ,hereinbefore referred to. To the open face of such a pulleycase I fasten, by means of the screw k, which secures theupper end of the pulley-case to the windowframe,or by any other suitable means, a concave cap, m, the concavity of which is of sufficient depth to extend over the projecting edge of the pulley c and allow room for the free movement of the corb b.

The lower end of the cap m is reduced in diameter and depth,as at a, to a size sufficient topermit the free passage of the cord b without cramping the same, and yet be practically filled by the body of the cord, so as to permit the passage of little or no dust through the same.

The portion a constitutes a guide for the sash-cord b, which prevents its becoming kinked or snarled and being drawn in between the pulley and'its case in that condition, and thus it prevents the cord Vl'rom being caught, as has been before described with regard to the old construction.

My improvement is extremely simple in its character,cheap in its construction and application, gives a finish to the upper portion of the window-frame, and obviates the objections to the open-face pulley-case heretofore used. It is applicable not only to window-sash pulleys, but also to analogous uses where a cord passes to and over a pulley secured in a niortise or other similar place. e

If desired, the cap may be cast on or in one piece with the sheave or pulley case,or it may be hinged thereto at the upper end. For the purpose of applying the cap to existing openfaced pulley-cases now in use, I prefer to make it separate; but for application to new work I prefer to cast it on the ease, because such construction is more economical and the cap is not liable to be lost or improperly.applicd.

Another advantage of my improvement is that it increases the Warmth of frame houses, the weather-boarding of which forms numerous open joints or grooves which communicate more or less with the Weightgrooves,and thus admit streams of coldaii` into them, whence it passes through the open face of the pulley-case into the room. By closing the face of the pulley-ease I prevent the greater part of this cold air from passing through it.

What I claim as my invention, and desire to secure by Letters Patent, is

CHRISTOPHER S. WELLS. Witnesses:

W. B. CoRwIN, THOMAS B. KERR. 

